618354600721644 has 96 divisors (see below), whose sum is σ = 1500458681989120. Its totient is φ = 197984879078400.

The previous prime is 618354600721643. The next prime is 618354600721673. The reversal of 618354600721644 is 446127006453816.

618354600721644 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a hoax number, since the sum of its digits (57) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (618354600721643) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 206430852 + ... + 209404884.

Almost surely, 2^{618354600721644} is an apocalyptic number.

It is an amenable number.

618354600721644 is an abundant number, since it is smaller than the sum of its proper divisors (882104081267476).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

618354600721644 is a wasteful number, since it uses less digits than its factorization.

618354600721644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2978231 (or 2978229 counting only the distinct ones).

The product of its (nonzero) digits is 23224320, while the sum is 57.

The spelling of 618354600721644 in words is "six hundred eighteen trillion, three hundred fifty-four billion, six hundred million, seven hundred twenty-one thousand, six hundred forty-four".